YAML Formatter

Format and prettify YAML content with configurable indentation. Parses and re-serializes for consistent formatting.

YAML Input

Indent Size

Frequently Asked Questions

How does the YAML formatter work?

The formatter parses YAML into a structured representation, then re-serializes it with consistent indentation and formatting. It handles strings, numbers, booleans, nulls, arrays, nested objects, and multiline values.

Does this support all YAML features?

This tool supports the most common YAML features: key-value pairs, nested mappings, sequences (arrays), quoted strings, comments preservation is limited. For advanced features like anchors, aliases, or custom tags, use a full YAML library.

Is my data sent to a server?

No. All parsing and formatting happens locally in your browser. Your YAML content never leaves your machine.